X0306 4 2021-12-10 0 0001828791 Viant Technology Inc. DSP 0001284309 MADDEN LARRY C/O VIANT TECHNOLOGY INC. 2722 MICHELSON DRIVE, SUITE 100 IRVINE CA 92612 0 1 0 0 Chief Financial Officer Class A Common Stock 2021-12-10 4 F 0 16784 9.41 D 399291 D This Form 4 is being filed late due to administrative error. Represents shares withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting of 31,876 restricted stock units on December 10, 2021. These shares were not issued to or sold by the Reporting Person. /s/ Larry Madden 2022-01-14